113 R.E. Johnson 1767 Red-tailed Hawk March 3 Tilden Regional Park, Alameda Co., Calif. (cont.) appeared below and the hawk immediately flew away. Perhaps the cat was the object of prey but more likely it was after the same item as the hawk was watching. Probably the cat was too big to be attack by the hawk. The hawk returned again to the second hawk, hovered near it for less than a minute, then returned again to the area where the cat was seen. All of this action took approx. 30 minutes. The ground beneath the hawks is open, dry grassland (west facing) with extensive patches of coyote bush in it. (One of the students reported seeing that one hawk on the back of other (as described above) a second time while I was looking elsewhere. He noted that lower bird also had legs extended downward.)